Calculate SNR

GNU Radio
1

Hi,

I was wondering how to calculate SNR. Is there function already a
function
that I can use to find SNR?

Thanks in advance for your help
Meenaktchi

2

On 11/9/07, Meenaktchi V. [email protected] wrote:

Hi,

I was wondering how to calculate SNR. Is there function already a function
that I can use to find SNR?

If you know where your constellation symbols are, and you know where
the IQ symbol really ended up after equalization - calculating the
amount of noise should be straight forward.

I don’t know if there is a block which takes in a constellation
mapping along with a stream of IQ datapoints and calculates SNR.

Brian

3

Brian P. wrote:

I don’t know if there is a block which takes in a constellation
mapping along with a stream of IQ datapoints and calculates SNR.

Brian

You can compute mse between received points and hard decisions, but this
will be a biased estimate at low s/n.

4

On Nov 9, 2007 11:46 AM, Brian P. [email protected] wrote:

Can anyone tell me how to go abt this? I am quite lost

Thanks for your help
M

5

This article might be helpful. It’s targeted at matlab, but easily
transferable to python.
http://www.transcrypt.com/resources/all/files/19388/_fn/bit-error-rate_simulation_using_matlab.pdf

On Nov 10, 2007 11:15 AM, Meenaktchi V.
[email protected]